7 HVAC Service Contractors in Johns Island, SC
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Top-Rated HVAC Service Contractors in Johns Island
Carney & Son 72 Degrees
“Every sampled review awards 5 stars, with 4 of 5 reviewers naming specific technicians, Jacob, Daniel, Ryan, and Clarice consistently recognized for patience…”
AGL Heating & Air
“881 reviews all carry five-star ratings, with customers frequently citing specific technicians by name. Multiple reviewers note the company fixed problems left…”
All HVAC Service Contractors (7 total)
5 Star Charleston Johns Island
“Fourteen reviewers specifically mention technicians by name, with Christian and Zach receiving the most…”
James Island Heating & Air, LLC
“25 of the 27 reviews award 5 stars, with customers consistently citing fast response times and knowledgeable…”
Triad Mechanical Contractors
“Four of 14 reviewers awarded 1-star ratings, citing unresponsive service, professionalism breakdowns, and…”
HVAC Service Costs in Johns Island
General HVAC service pricing across maintenance, repair, and installation in Johns Island.
| Service | Low | Average | High |
|---|---|---|---|
Service call / diagnostic | $75 | $120 | $200 |
Routine tune-up (single system) | $70 | $125 | $200 |
Standard repair (avg) | $150 | $600 | $1,200 |
Major repair (compressor, heat exchanger) | $1,500 | $2,500 | $3,500 |
New system installation (mid-range) | $6,500 | $10,500 | $14,000 |
Full HVAC replacement AC + furnace combined | $11,590 | $13,430 | $14,100 |
Prices reflect humid subtropical metro averages compiled from published industry cost guides, contractor surveys, and regional labor data. Last updated: April 2026.
HVAC Service in Johns Island, SC: What to Expect
Charleston’s coastal Lowcountry climate makes cooling and moisture control the primary reasons homeowners call for hvac-service Johns Island. Hot, humid summers with 89°F highs and 78% humidity push heat indexes well above the thermometer, while Atlantic moisture increases latent loads from May through September. Salt air speeds corrosion, so seven local contractors — averaging a 4.7 rating from 2,276 reviews and one offering 24/7 service — stay busy year-round.
Clear cost figures from topCostItems aren’t provided here, so expect variability based on system size, corrosion mitigation needs, and replacement versus repair decisions. Routine maintenance contracts and corrosion-resistant materials add to upfront costs but often extend equipment life in this environment. South Carolina requires a Mechanical Contractor (Group 2 — HVAC) license issued by the Contractor’s Licensing Board, so confirm credentials and insurance before work begins.
Customer highlights were not supplied, so prospective clients should scan reviews for response times, documented corrosion work, and seasonal performance reports. Repeated praise for technicians who perform thorough coil and duct checks is common in coastal markets; likewise, expect notes about warranty handling and timely parts procurement. Prioritize contractors who demonstrate corrosion prevention strategies and offer clear maintenance plans.